In chapters 21-30 we see David's forces growing stronger and stronger while Saul's forces get weaker and weaker. This is a further demonstration of the fertility theme. However these chapters also develop the motif of the proper response to Yahweh's anointed.
Interesting, too, are the parallels between David's experiences as the Lord's anointed and Jesus Christ's as the Lord's anointed. Rejection preceded acceptance, and suffering preceded reigning in both cases. God blessed both of these servants personally, and they became a blessing to others because of their commitment to Yahweh and His Law.
"The true servant of God must willingly suffer affliction with the full assurance that God is performing His purposes. Positions of prominence and prestige are not to be sought and worked for. Rather, the leader who desires Christ's blessing must wait patiently on Him for advancement and promotion to opportunities of greater service."226
Several of the Psalms have their backgrounds in these chapters (Ps. 18; 34; 52; 54; 56; 57; 63; 124; 138; 142; and possibly others).